固体潮对油气运移的影响研究

发布时间：2018-02-05 03:03

本文关键词： 固体潮油气运移影响　出处：《成都理工大学》2015年硕士论文　论文类型：学位论文

【摘要】：固体潮每天都在重复发生。许多观测都已表明,固体潮对地下水运移有一定的影响。油气也是赋存在岩石孔隙中的流体。固体潮能对地下水的运移有影响,对油气的运移理应也会产生影响。迄今为止,油气运移研究基本上都没有考虑固体潮的影响。本文的主要内容就是分析讨论固体潮对油气运移的影响,以及这种影响是否应该纳入油气运移驱动力考虑范畴。不同于海洋、湖泊的潮汐,固体潮现象不易被人察觉。在潮汐力的作用下,地表每天的起伏在35至40cm之间。在行星连珠(如日食、月食)发生期间,地表的起伏可以超过40cm。在一天之内,地表的起伏出现两次峰(谷)值,但这不代表固体潮的周期仅为半天。事实上,固体潮包含多种成分。按照周期来划分,固体潮的成分可以分为半日潮(周期为12小时左右)、日朝(周期为24小时左右)以及长周期潮(周期在半个月及以上)。固体潮对油气运移的影响机制可以概括为:潮汐力的作用使地壳发生周期性的形变,而这种周期性的形变不仅使储层的微结构发生了变化,还对储层中的压力分布造成了扰动,进而产生了水力学响应。本文通过理论分析得到了固体潮影响油气运移的微观机制与宏观机制。微观上,笔者通过分析油团穿过喉道的临界条件并结合固体潮的作用机制证实,固体潮产生的压力变化可以为喉道中的油团运动提供额外的驱动力,帮助接近临界状态的油团穿过喉道。宏观上,笔者通过渗流力学方面的分析得出结论:固体潮通过对压力的扰动使储层中的渗流场发生了变化,这种变化在总体上体现为促进作用。为了进一步确定固体潮影响的量级,本文通过一个简单断层疏导模型分别计算了固体潮对油气运移速率及运移量的影响幅度,并分别与总运移速率及运移量进行了对比,获得了固体潮影响油气运移的趋势与量级。
[Abstract]:The solid tide is repeated every day. Many observations have shown that the solid tide has a certain effect on the groundwater migration. Oil and gas is also a fluid in the rock pores. The solid tide energy has an effect on the groundwater migration. So far, the influence of solid tide has not been considered in the study of hydrocarbon migration. The main content of this paper is to analyze and discuss the effect of solid tide on oil and gas migration. And whether this effect should be considered as a driving force for oil and gas migration. Different from the tide in the ocean and lake, the phenomenon of solid tide is not easy to be noticed. The surface fluctuates from 35 cm to 40 cm per day. During eclipses of the sun and the moon, the surface can fluctuate more than 40 cm. Within one day. There are two peaks (valleys) in the surface undulation, but this does not mean that the period of the solid tide is only half a day. In fact, the solid tide contains a variety of components and is divided according to the period. The composition of the solid tide can be divided into semidiurnal tides (the period is about 12 hours). The influence mechanism of solid tide on oil and gas migration can be summarized as follows: the effect of tidal forces on crustal deformation occurs periodically. The periodic deformation not only changes the microstructure of the reservoir, but also disturbs the pressure distribution in the reservoir. In this paper, the microscopic mechanism and macroscopic mechanism of the effect of solid tide on oil and gas migration are obtained by theoretical analysis. By analyzing the critical condition of the oil mass passing through the throat and combining the mechanism of the solid tide, it is proved that the pressure change caused by the solid tide can provide additional driving force for the oil mass movement in the throat. From the macroscopic point of view, through the analysis of percolation mechanics, it is concluded that the seepage field in the reservoir has been changed by the disturbance of the solid tide to the pressure. In order to further determine the magnitude of the effect of the solid tide, this change is reflected in the overall role of promotion. In this paper, a simple fault grooming model is used to calculate the influence of solid tide on oil and gas migration rate and migration rate, respectively, and compared with the total migration rate and migration volume. The trend and order of magnitude of the effect of solid tide on oil and gas migration are obtained.
【学位授予单位】：成都理工大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：P618.13;P312.4

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